Apparatus for cleaning boilers.



D. F. McGILL.

APPARATUS FOR. CLEANING BOILERS.

APPLICATION FILED SBPT.16, 1911.

1,124,634.. PatentedJan.12,1915.

Witnesses; Inventor; By

711:; women PETERS CO. PHOTU-LHHu, WASHING TON D C.

srairns DANIEL F. MCGILL, OF PORTLAND, OBEGON, ASSIGNOR TO I IL'GGILLBOILER CLEANER COMPANY, OF PORTLAND, OREGON, A CORPORATION.

APPARATUS FOR CLEANING BOILERS.

messes.

Specification of Letters Patent.

Patented Jan. 12, 1 .315.

Application filed September 16, 1911. Serial No. 649,623.

To all whom it may concern:

Be it known that I, DANIEL F. MCGILL, a citizen or the United States,residing at Portland, in the county or" Multnomah and State of Oregon,have invented certain new and useful Improvements in Apparatus forCleaning Boilers, of which the following is a specification.

This invention relates to improvements in boiler cleaners and has forits object to provide a circulatory system which will cause a sluggishflow of the water at a certain point so as to permit a deposit of theparticles carried in suspension by the water.

A further object is to provide, in a circulatory system through boilers,a means of precipitating the sediment carried n sus pension by the waterand to collect 1t in a suitable tank where it can be removed, andthereby prevent the deposit of scale on the interior of the boiler.

\Vith these objects in view the invention consists in the novelconstruction and arrangement of parts illustrated in the accompanyingdrawing, in which- Figure 1 is a perspective view of a boiler showing myimproved circulatory system as applied. Fig. 2 is a detail sectionalview showing a section of pipe arranged to contain a chemical reagentfor precipitating the sediment held in solution.

Referring to the drawing in detail, the character 1 represents a boilerof usual construction having the fire box 1. From the rear end of theboiler, at a point near the top, but below the water level, is insertedone or more pipes 7, which connect with risers 9 each containing acut-off valve 8, and uniting above the boiler into the single pipe 10.This pipe is united by means of a T-joint having a cut-o'li 10 in itsouter end, with the horizontal pipe 11 extending to a point near theopposite end of the boiler. Here the pipe 12 leads down to the horizontal pipe 5, with which it is connected by means of a T-joint and whichextends to a convenient place near the front end of the boiler; and bymeans of vertical pipe 4 it is connected in the upper end of theprecipitating tank 2. resting on the pedestal 23. Alongside of theentering pipe 4 is a vertical outlet pipe 6, which connects withhorizontal pipe 18 leading to the front end of the boiler, and there. bymeans of a T-joint carrying a cut-off valve 15 in its outer end,

connects with a suitable union 16 from which one or more transverse arms1% extend. From each arm or pipe 1 there is dropped a pipe 17 whichdivides near the bottom of the boiler into branches 19, each of whichcontains a cut-oli' valve and is provided with a. terminal member 20,which enters the boiler near the lower water line, thus completing thecircuit. t is obvious that the position of the pipes leading from thetank to the boiler may be varied to suit the conditions and theconvenience oi the operator. It is essential only that the water leavesthe tank at the upper end near the inlet pipe and that it enters theboiler near the lowest level.

'The chamber 5 of the pipe is provided with a portion 5 which extendsforward of the pipe 1., and with another portion 5 extending back ofpipe 12. lVithin the pipe 5, which is preferably larger than the otherpipes of the system, is placed a sheet or tube 29 of aluminum, thoughanother suitable reagent may serve the same purpose. This is made ofequal length with pipe 5 and the cap 31 prevents longitudinal movementtherein. Apertures 24- and 26 are provided in the tube 29 to registerwith the openings in the T-joints 30 and 25 respectively. The cap 31 isprovided with a central aperture to receive the rod of the brush 28, andthe packing 32 prevents leakage therethrough. By use of handle 3 thebrush may be reciprocated so as to keep the surface of the aluminum freefrom deposits of sediment. The extensions at each end of the tube 5afford room for the brush to rest so that it will not interfere with thecirculation of the water, when not in use. The system having been filledwith Water and the valve 10 closed, the other valves being open, theapplication of heat to the boiler, as in any hot-water system, willcause the water to rise through the higher outlets 7, passing throughpipes 114l and entering tank 2. Here the larger volume of water willmove more slowly, thus allowing the particles carried by the more rapidcurrent to settle on the bottom, the upward motion of the water towardthe exit pipe 6 not be ing sufficientl rapid to hold the particles insuspension. This arrangement of the inlet and outlet pipes in the tankalso facilitates the deposit of sediment carried in the water.

The infiowing water tends to prevent the formation of a current towardthe outlet, and also tends to force toward the bottom the particles ofsediment.

The formation of scale in boilers is due to the presence in the water ofsulfates of calcium and magnesium and other substances which have anailinity for aluminum, and other chemical reagents. I have, thereforeplaced in the section of pipe just preceding the precipitating tank alining of aluminum which, acting on compounds of the elements indicated,disintegrates them causing the residue to flow into the tank where it isdeposited as silt, which will not form scale, and which may be drawn offat proper intervals by means of faucet 22. It will be seen that by useof this system the scale forming substances will be carried from thewater and not allowed to form on the boiler, which will thus remainclean. Old boilers containing water which has thus been deprived of thescale forming substances, will be relieved of the scale by a similardisintegration thereof.

Having thus described my invention, what I claim is 1. In a system ofthe class described, the combination with a boiler, of a tank positionedadjacent thereto, a pipe rising from the upper end of the tank. a pipeleading from the boiler at a point slightly below the water-level andrising above the boiler, a cut-off valve in said riser, a pipe leadingfrom said riser toward said tank, a section depending therefrom, a pipeconnecting said depending portion with that rising from the tank andhaving its inner wall covered with aluminum, a brush reciprocatingtherein, a pipe leading from the upper end of said tank at a pointadjacent the entrance pipe of said tank and entering said boiler belowthe water level, a cut-oil valve in said return pipe, and a draw-offvalve in the lower end of the tank.

2. In a system of the class described, the combination with a boiler, ofa tank positioned adjacent thereto, a pipe leading from the boiler'at apoint slightly below the water level and rising above the boiler, acut-off valve in said riser, a pipe leading from the riser toward thetank, a chamber connecting the last named pipe with the upper end of thetank and having its inner wall covered with a different metal serving asa chemical reagent, a pipe leading from the upper end of the tank at apoint adjacent the entrance pipe of said tank and enteringthe boilerbelow the water level, a cut-off valve in said return pipe, and adraw-oil valve in the lower end of said tank.

3. In a system of the class described, the combination with a boiler, ofa tank positioned adjacent thereto, a pipe rising from the end-of thetank, a pipe leading from the boiler ..at a pointeslightly -bclowtheiwater level and rising above the boiler, a cut-on valve in saidriser, a pipe leading from the riser toward said tank, a sectiondepending therefrom, a chamber connecting said depending portion withthat rising from the combination with a boiler of a tank positionedadjacent thereto, a pipe rising from the end of the tank, a pipe leadingfrom the boiler at a point slightly below the water level and risingabove the boiler, a cut-ofi' valvein said riser, a pipe leading from theriser toward said tank, a section depending therefrom, a chamberconnecting said depending portion with that rising from the tank theends of which project beyond the said connected pipes, a pipe leadingfrom the upper end of the tank at a point adjacent the inlet pipe tosaid boiler, entering sameat the lower water level, a cut-off valve insaid return pipe, a draw-off valve in the lower end of said tank, analuminum lining secured in said chamber, and a brush adapted toreciprocate therein for cleansing said lining.

5. In a system of the class described a boiler, a feed-water systemsupplying water thereto, a chamber formed in said system, and analuminum lining secured in said chamber.

6. In a system of the character described,

a boiler, a settling tank, a conduit connecting the boiler and settlingtank, and a second conduit connecting the boiler and settling tank andincluding an aluminum conduit receiving the water therethrough todecompose the boiler-scale forming substances held in suspension in thewater.

7. In a system of the character described, a boiler, a settling tank, asupply conduit connecting the settling tank and boiler, and an outletconduit connecting the settling tank and boiler and having a substantialportion of its inner wall formed of aluminum and receiving the watertherethrough for decomposing the boiler-scale forming substances held insuspension by said water.

8. In a system of the character described, a conduit adapted to beconnected with-a boiler at a plurality of points to form a circulatorypassage'for the water in the boiler, and an aluminum conduit-sectionconnected in said conduit and receiving the water there.-

"through 'for decomposing the boiler-scale ,Lforming substances held insuspension in the Water.:;.

9. In a system of the character described, a boiler, a conduit connectedtherewith and a boiler, a settling tank, conduits connecting having aninterior lining of aluminum to the settling tank and boiler, and achemical, receive the Water theret'hrough, a second reagent of adifferent character from the conduit connected With the boiler, and a 155 material of one conduit, arranged therein shell connecting the tWoconduits.

and secured to the inner Wall thereof, to re- In testimony whereof Iafiix my signature ceive the Water therethrough, Without perin presenceof tWo Witnesses. ceptibly retarding its flow, for decomposing DANIEL F.MOGILL. the boiler-scale forming substances held in Witnesses: 10suspension by the Water. H. DANIEL,

10. In a system of the character described, A. J. MATTER.

Copies 0! this patent may be obtained or five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

